/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org

This file is part of Gephi.

Gephi is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

Gephi is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with Gephi.  If not, see <http://www.gnu.org/licenses/>.
*/
package org.gephi.desktop.hierarchy;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.io.Serializable;
import java.util.logging.Logger;
import javax.swing.DefaultComboBoxModel;
import javax.swing.SwingUtilities;
import org.gephi.graph.api.GraphController;
import org.gephi.graph.api.GraphModel;
import org.gephi.graph.api.HierarchicalGraph;
import org.gephi.ui.utils.BusyUtils;
import org.gephi.ui.utils.BusyUtils.BusyLabel;
import org.openide.util.Lookup;
import org.openide.util.NbBundle;
import org.openide.windows.TopComponent;
import org.openide.windows.WindowManager;
//import org.openide.util.Utilities;

final class HierarchyTopComponent extends TopComponent {

    private static HierarchyTopComponent instance;
    /** path to the icon used by the component and its open action */
//    static final String ICON_PATH = "SET/PATH/TO/ICON/HERE";
    private static final String PREFERRED_ID = "HierarchyTopComponent";

    //Dendrogram
    private Dendrogram dendrogram;

    private HierarchyTopComponent() {
        initComponents();
        setName(NbBundle.getMessage(HierarchyTopComponent.class, "CTL_HierarchyTopComponent"));
//        setToolTipText(NbBundle.getMessage(HierarchyTopComponent.class, "HINT_HierarchyTopComponent"));
//        setIcon(Utilities.loadImage(ICON_PATH, true));

        initToolbar();
        dendrogram = new Dendrogram();
    }

    private void initToolbar() {
        refreshButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                refresh();
            }
        });

        levelLimitCombo.addItemListener(new ItemListener() {

            public void itemStateChanged(ItemEvent e) {
                int lvl = levelLimitCombo.getSelectedIndex();
                if (lvl != dendrogram.getMaxHeight()) {
                    dendrogram.setMaxHeight(lvl);
                    refresh();
                }
            }
        });
    }

    private void refreshLevelLimit(HierarchicalGraph graph) {
        int h = graph.getHeight();
        DefaultComboBoxModel comboBoxModel = new DefaultComboBoxModel();
        comboBoxModel.addElement(NbBundle.getMessage(HierarchyTopComponent.class, "HierarchyTopComponent.bar.levelmax"));
        String levelStr = NbBundle.getMessage(HierarchyTopComponent.class, "HierarchyTopComponent.bar.level");
        for (int i = 1; i <= h; i++) {
            comboBoxModel.addElement(levelStr + " " + i);
        }
        levelLimitCombo.setModel(comboBoxModel);
        levelLimitCombo.setSelectedIndex(Math.min(h, dendrogram.getMaxHeight()));
    }

    public void refresh() {
        final GraphModel model = Lookup.getDefault().lookup(GraphController.class).getModel();
        if (model != null) {
            Thread thread = new Thread(new Runnable() {

                public void run() {
                    BusyLabel busyLabel = BusyUtils.createCenteredBusyLabel(centerScrollPane, NbBundle.getMessage(HierarchyTopComponent.class, "HierarchyTopComponent.busyLabel.text"), dendrogram);
                    busyLabel.setBusy(true);
                    final HierarchicalGraph graph = model.getHierarchicalGraph();
                    SwingUtilities.invokeLater(new Runnable() {

                        public void run() {
                            refreshLevelLimit(graph);
                        }
                    });
                    dendrogram.refresh(graph);
                    busyLabel.setBusy(false);
                }
            }, "Dendrogram refresh");
            thread.start();
        }
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;

        toolPanel = new javax.swing.JPanel();
        labelLevelLimit = new javax.swing.JLabel();
        levelLimitCombo = new javax.swing.JComboBox();
        refreshButton = new javax.swing.JButton();
        centerScrollPane = new javax.swing.JScrollPane();

        setLayout(new java.awt.BorderLayout());

        toolPanel.setLayout(new java.awt.GridBagLayout());

        org.openide.awt.Mnemonics.setLocalizedText(labelLevelLimit, org.openide.util.NbBundle.getMessage(HierarchyTopComponent.class, "HierarchyTopComponent.labelLevelLimit.text")); // NOI18N
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.insets = new java.awt.Insets(2, 4, 0, 0);
        toolPanel.add(labelLevelLimit, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.insets = new java.awt.Insets(0, 4, 0, 0);
        toolPanel.add(levelLimitCombo, gridBagConstraints);

        org.openide.awt.Mnemonics.setLocalizedText(refreshButton, org.openide.util.NbBundle.getMessage(HierarchyTopComponent.class, "HierarchyTopComponent.refreshButton.text")); // NOI18N
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.EAST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(2, 0, 0, 4);
        toolPanel.add(refreshButton, gridBagConstraints);

        add(toolPanel, java.awt.BorderLayout.PAGE_START);

        centerScrollPane.setBorder(null);
        centerScrollPane.setHorizontalScrollBarPolicy(javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        centerScrollPane.setVerticalScrollBarPolicy(javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
        add(centerScrollPane, java.awt.BorderLayout.CENTER);
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JScrollPane centerScrollPane;
    private javax.swing.JLabel labelLevelLimit;
    private javax.swing.JComboBox levelLimitCombo;
    private javax.swing.JButton refreshButton;
    private javax.swing.JPanel toolPanel;
    // End of variables declaration//GEN-END:variables

    /**
     * Gets default instance. Do not use directly: reserved for *.settings files only,
     * i.e. deserialization routines; otherwise you could get a non-deserialized instance.
     * To obtain the singleton instance, use {@link #findInstance}.
     */
    public static synchronized HierarchyTopComponent getDefault() {
        if (instance == null) {
            instance = new HierarchyTopComponent();
        }
        return instance;
    }

    /**
     * Obtain the HierarchyTopComponent instance. Never call {@link #getDefault} directly!
     */
    public static synchronized HierarchyTopComponent findInstance() {
        TopComponent win = WindowManager.getDefault().findTopComponent(PREFERRED_ID);
        if (win == null) {
            Logger.getLogger(HierarchyTopComponent.class.getName()).warning(
                    "Cannot find " + PREFERRED_ID + " component. It will not be located properly in the window system.");
            return getDefault();
        }
        if (win instanceof HierarchyTopComponent) {
            return (HierarchyTopComponent) win;
        }
        Logger.getLogger(HierarchyTopComponent.class.getName()).warning(
                "There seem to be multiple components with the '" + PREFERRED_ID +
                "' ID. That is a potential source of errors and unexpected behavior.");
        return getDefault();
    }

    @Override
    public int getPersistenceType() {
        return TopComponent.PERSISTENCE_ALWAYS;
    }

    @Override
    public void componentOpened() {
        // TODO add custom code on component opening
    }

    @Override
    public void componentClosed() {
        // TODO add custom code on component closing
    }

    /** replaces this in object stream */
    @Override
    public Object writeReplace() {
        return new ResolvableHelper();
    }

    @Override
    protected String preferredID() {
        return PREFERRED_ID;
    }

    final static class ResolvableHelper implements Serializable {

        private static final long serialVersionUID = 1L;

        public Object readResolve() {
            return HierarchyTopComponent.getDefault();
        }
    }
}
